Question

A scientist discovers a fossil of a trilobite in a rock layer. Trilobites are examples of index fossils.

How is the discovery useful?


1. It suggests that more fossils exist in deeper rock layers.
2.It helps date the rock layer.
3.It provides evidence that trilobites are alive today.
4.It shows where other trilobite fossils can be found.

Answer 1

2.It helps date the rock layer.

Step-by-step explanation:

Geologist use trilobites to help them understand how earth was created( relative dating method )